// 头部
.header {
  width: 100vw;
  height: 3rem;
  position: fixed;
  top: 0;
  z-index: 999;
  background: #fff;
  border-bottom: 0.2rem solid #eee;
  .header-item {
    width: 90%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: auto;
    .avatar {
      --size: 2.5rem;
      --border-radius: 50%;
    }
    .avatars {
      --size: 2.5rem;
    }
  }
}
